Granted Patent
Utility
US 5,403,281 · App. 07/951,725
Inline heat exchanger and cardioplegia system
Inventors:
William G. O'Neill, Timothy P. Walker
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: Sep 25, 1992
Inventors
William G. O'Neill
Timothy P. Walker
Assignee (at issue)
Minnesota Mining and Manufacturing Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.